Notley says the action is necessary to reverse the widening price differential that she said could cause further harm to Alberta’s economy if not addressed immediately.

Alberta’s oil is selling at markedly lower rates compared with the North American benchmark, due in part to oil pipeline bottlenecks.

“In the last few weeks, this price gap has reached historic highs because we are producing considerably more product than there is transport capacity,” Notley said in a speech timed to run live on supper-hour newscasts in Alberta.

“This is creating a huge backlog and forcing the price of our oil to ridiculously low levels…. We are essentially giving our oil away for free.”

Roughly speaking, Notley said, while the rest of the world sells its oil at about $50 per barrel, Alberta fetches only $10.

The announcement is expected to narrow the differential by at least $4 per barrel and add an estimated $1.1 billion to government revenues in 2019-2020.

The premier has already said the province will buy as many as 80 locomotives and 7,000 rail tankers — expected to cost hundreds of millions of dollars — to move the province’s excess oil to markets, with the first shipments expected in late 2019.

But she has said that rail cars, along with eventually increasing domestic refining capacity and building new pipelines, won’t bring relief soon enough.

“We must act immediately,” Notley said Sunday.

The Opposition United Conservatives and the centrist Alberta Party had already called for the production cut. Notley thanked them both in her speech.

Industry feelings prior to the announcement had been mixed.

Cenovus Energy proposed the idea of a production cut last month. However, Imperial and Husky said Friday they remain opposed to involuntary production cuts.

The move is not unprecedented — in 1980, Tory premier Peter Lougheed forced oil production cuts to protest the federal Liberals’ national energy program.